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Battery management system and voltage signal processing method thereof

A technology of a battery management system and a processing method, which is applied in the field of battery monitoring and management, and can solve problems such as insufficient accuracy of fault determination, time-consuming and labor-intensive, and increased after-sales maintenance costs, etc.

Active Publication Date: 2020-11-24
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing fault determination methods may have errors in fault determination, and the accuracy of fault determination is not enough. It will take time and effort to troubleshoot and increase the cost of after-sales maintenance.

Method used

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  • Battery management system and voltage signal processing method thereof
  • Battery management system and voltage signal processing method thereof
  • Battery management system and voltage signal processing method thereof

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Embodiment Construction

[0072] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0073] figure 1 is a schematic structural diagram of a battery pack provided by an embodiment of the present invention, figure 2 It is a flow chart of a voltage signal processing method of a battery management system provided by an embodiment of the present invention, refer to Figure 1-Figure 2 , firstly, the battery pack is provided with a plurality of battery modules 10, and the plurality of battery modules 10 are connected in series; each battery module 10 is provided with a plurality of battery cells 100, a...

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Abstract

The embodiment of the invention discloses a battery management system and a voltage signal processing method thereof. The voltage signal processing method comprises the following steps: collecting thevoltage at the two ends of each battery monomer, the voltage at the two ends of each battery module, the battery internal total voltage of the battery pack and the battery external total voltage, comparing the four types of voltages in pairs, taking a comparison result of which the difference value is smaller than a preset threshold value as a condition, and respectively determining the credibility of the four types of voltages according to the satisfaction conditions of at least two conditions in the six conditions, thereby realizing accurate judgment of a voltage signal acquisition fault inthe battery pack. According to the embodiment of the invention, the method can improve the effectiveness of battery voltage collection fault judgment, achieves the effective diagnosis and processingof a voltage signal, can achieve the accurate fault prompt, and achieves the timely troubleshooting.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of battery monitoring and management, and in particular to a battery management system and a voltage signal processing method thereof. Background technique [0002] The battery management system is one of the core technologies of electric vehicles. The main functions of the battery management system are to monitor and estimate the state of the battery, and to control and manage the battery charge and discharge, equalization, fault diagnosis, and thermal management. Acquisition of voltage signals of battery cells, battery modules and battery total voltage in the battery system is an important means of state monitoring. During the entire operation of the electric vehicle, whether the battery system is in the charging state or in the discharging state, it is necessary to monitor the voltage of each battery cell in the battery system in real time, so as to effectively manage the battery and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/388G01R31/389G01R31/392G01R31/36
CPCG01R31/388G01R31/389G01R31/392G01R31/3648
Inventor 董宇朱庆林李秋影高洁鹏刘佳辉项小雷王博
Owner FAW JIEFANG AUTOMOTIVE CO
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